- Berlin Custom Leather Breast Collar: Quality that you cannot find anywhere else! This contoured breast collar is handmade in the USA, from the hardworking Amish community! Made with Hermann Oak Harness Leather this breast collar tapers from 1 ¾” to 1” and features girth straps that adjust with a Conway buckle, stainless steel hardware and ¾” tugs. This is a great choice for trail riders.